Explosion-Proof Loop-Powered Process and Level Indicator
TEK-LCD 7800B SERIES EXPLOSION-PROOF LOOP-POWERED PROCESS AND LEVEL INDICATOR
The Tek-LCD 7800B is one of Tek-Trol’s most advanced and feature-packed explosion-proof, loop-powered indicators. The fact that this meter is loop-powered means that there is no need to run additional, costly power lines into a hazardous area. The Tek-LCD 7800B carries FM, CSA, ATEX, and IECEx approvals for use in hazardous areas. It features a dual-line display that can be easily scaled in the field for any 4-20 mA analog input. The display has a five digit upper display, a seven alpha-numeric character lower display, and is available with a twenty-segment bar graph for level applications. Two features that really make the TEK-LCD 7800B stand out are its wide viewing angle display and SafeTouch® through-glass buttons. These buttons allow the Tek-LCD 7800B to be programmed and operated through the glass, thus eliminating the need to remove the cover in a hazardous area.
Features
Specifications
Documents
Features
- 4-20 mA Input
- Modern, Sleek and Practical Enclosure for Safe Areas
- 5-Digit, 0.7″ (17.8 mm) Upper Display (0.6″ for -0L1 Models)
- Optional Level Indicator Bar Graph
- 7 Alphanumeric Character, 0.4″ (10.2 mm) Lower Display
- SafeTouch® Through-Glass Button Programming
- Password Protection
- 32-Point , Square Root, or Exponential Linearization
- Loop or External DC-Powered Backlight Standard
- 3.0 V Drop (6.0 V with Backlight)
- Explosion-Proof, IP68, NEMA 4X Enclosure
- HART Protocol Transparent
- Operates from -40 °C to 75 °C
Specifications
| Display | Five digits (-9999 to 99999) 0.70″ (17.8 mm) high, 7-segment, automatic lead zero blanking; |
| Decimal Point | Upper process display has up to four decimal places or none: d.dddd d.ddd, d.dd, d.d, or ddddd |
| Display Update Rate | Ambient > -25°C: 2 Updates/Second. Ambient < -25°C: 1 Update/5 Seconds |
| Externally Powered Backlight | Voltage Range: 9-36 VDC |
| Display Orientation | Display may be mounted at 90° increments up to 270° from default orientation |
| Over Range | Display flashes 99999 |
| Under Range | Display flashes -9999 |
| Programming Method | Four SafeTouch® through-glass buttons when cover is installed. Four internal pushbuttons when cover is removed. |
| Noise Filter | Programmable – Lo, Med, Hi, or Off |
| Recalibration | Recalibration is recommended at least every 12 months. |
| Max./Min. Display | Max/Min readings reached by the process are stored until reset by the user or until power to the meter is turned off. |
| Password | Programmable password restricts modification of programmed settings |
| Advanced Functions | Live input calibration, linearization, square root, or programmable exponent. |
| Alarm Indication | Flashing display plus HI/LO indicators |
| Non-Volatile Memory | All programmed settings are stored in non-volatile memory for a minimum of ten years if power is lost. |
| Normal Mode Rejection | 64 dB at 50/60 Hz |
| Operating Temperature Range | -40 °C to 75 °C |
| Storage Temperature Range | -40 °C to 75 °C |
| Relative Humidity | 0 to 90% non-condensing |
| Connections | Screw terminals accept 12 to 22 AWG wire |
| Enclosure | Explosion-proof die-cast aluminum with glass window, corrosion resistant epoxy coating |
| Mounting | May be mounted directly to conduit. Two slotted flanges for wall mounting or NPS 1½” to 2½” or DN 40 to 65 mm pipe mounting. |
| Overall Dimensions | 5.65″ x 5.25″ x 4.86″ (W x H x D) |
| Weight | 5.00 lbs (80 oz, 2.27 kg) |
Documents